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Retirement Plan - Schedule of Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 25, 2021	Mar. 26, 2020	Mar. 25, 2021	Mar. 26, 2020
Retirement Benefits [Abstract]
Service cost	$ 236	$ 178	$ 708	$ 534
Interest cost	214	223	643	669
Amortization of prior service cost	120	239	359	718
Amortization of loss	296	104	887	312
Net periodic benefit cost	$ 866	$ 744	$ 2,597	$ 2,233

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